P91 Feedwater Heater Seamless Pipe
P91 modified martensitic alloy seamless tube, 324.9 mm OD for feedwater heaters. Classified HTS 7304.59.20.70 for feedwater heater use, alloy steel, seamless, OD compliant.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If having diameter not exceeding 285.8 mm
Sub-11.25 inch OD moves to smaller size subheading 7304.59.10.
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Import Tips & Compliance
• PWHT (post-weld heat treatment) docs even for seamless; exact alloy analysis sheet; declare specific end-use
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